Brewing Vessels & SCOBY

Glass Brewing Jar

The primary vessel for the first fermentation — food-grade glass, wide mouth, 1 to 2 gallons.

Glass Brewing Jar — original illustration

Original illustration — a generic example of this tool, not a specific product.

Specifications

Category
Brewing Vessels & SCOBY
Material
Food-grade soda-lime or borosilicate glass
Wall
3–5 mm; thick enough to resist thermal shock when warm tea is added
Mouth
Wide mouth, 4–6 in (100–150 mm), for easy SCOBY removal
Lid
None required — the jar is covered with breathable cloth
Typical volume
1 gal for beginners, 2 gal for a weekly rotation
Cleaning
Hot soapy water, then a vinegar rinse; never abrasive pads
Typical batch size
1–2 gal (3.8–7.6 L)

Glass Brewing Jar

The primary vessel for the first fermentation — food-grade glass, wide mouth, 1 to 2 gallons.

A wide-mouth glass jar is the standard vessel for the first fermentation. Glass does not hold odours, does not scratch in a way that shelters bacteria, and lets you see the pellicle forming without opening the lid. A 1 gallon (3.8 L) jar suits a household brewing one or two bottles a week; a 2 gallon jar is the practical step up once you are bottling regularly.

glass first fermentation core
Best for
First Fermentation
Batch size
1–2 gal (3.8–7.6 L)

Applicable brewing stages

  • First Fermentation
  • Second Fermentation
  • Flavoring
  • Bottling
  • Cleaning & Testing

A highlighted stage means this tool has a direct role at that point in the process. Ticking several stages is normal — a thermometer, for example, is useful during both the first and second fermentation.

Safety notes

Use food-grade glass only. Never use decorative, leaded or unmarked glass, and never pour boiling liquid into a cold jar — thermal shock cracks the base and a cracked vessel under fermenting liquid is a laceration risk. Do not use a jar that has held chemicals, and do not brew in a container that has visible chips or star cracks.

Practical guidance

  • Buy two jars rather than one: a continuous-brew rotation needs a spare while the first is working.
  • Look for a jar with a spigot only if you will sanitise the spigot every single batch.
  • Sit the jar on a cloth or tray so spills are contained and the glass is not on bare stone.
  • Mark the fill level on the outside with a glass marker so every batch starts the same.

Please read before you brew

This page is educational reference material, not professional brewing, food-safety or medical advice. Equipment handling, hygiene practice and local rules vary, and nothing here guarantees a particular brewing result.

  • Home brewing rules differ by country, state, province and municipality, and they change over time. Check your own local requirements — including any permit, licence, volume limit or minimum age — before you brew, bottle or share what you make.
  • Use food-grade equipment only. Vessels, bottles, tubing and utensils that were not made for food or drink may release unwanted compounds or shelter microbes.
  • Work in a well-ventilated space, keep hot liquids away from children and pets, and follow the manufacturer's instructions for every appliance you use.
  • Bottles under pressure can fail. Use bottles designed for carbonated drinks, do not over-prime, and refrigerate once the carbonation is right.
  • For anything involving gas pressure, electricity, high heat, chemical cleaners or acids, consult a qualified professional.

Finished kombucha contains trace alcohol and caffeine. It is not suitable for children, and anyone who is pregnant, breastfeeding, immunocompromised, diabetic or taking medication should speak to a healthcare professional before drinking it. Kombucha is a food, not a medicine, and it does not treat, cure or prevent any disease.

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